Injector



(Mode1.) 8

W. R. PARK.

INJECTOR. No. 448,488. Patented Mar. 17, 1891.

a J1 2 d/ .B I

UNITED STATES 1 PATENT, Orrrcn.

\VIL'LIAM R. PARK, Oh TAUNTON, MASSACHUSETTS.

INJECTOR.

SPECIFICATION forming part of Letters Patent No. 448,488, dated March 17, 1891.

Application filed September 9,1887. Serial No. 249,269. (Modeh) To all whom it may concern.-

Be it known that I, WILLIAM R. PARK, of Taunton, in the county of Bristoland State of Massachusetts, have invented an Improved Jet Apparatus, of which the following is a specification, reference being bad to the accompanying drawings, in which Figure 1 is a lengthwise section showing the main features of myimproved apparatus. Fig. 2 is a section on line a; an of Fig. 1, and Fig. is a section on line 2 z of Fig. 1.

In my patent, No. 352,980, dated November 3, 1886, I have described a jet apparatus consisting of two steam-nozzles, each having its combining and delivery tubes and an overflow-chamber communicating with the second combining-tube by an opening or openings through the walls of that tube. In my pres ent invention it is essential to establish a jet through the combining and delivery tubes independent of the steam-nozzles of those tubes-that is to say, in my former apparatus the steam flowing through the steam-nozzles was what established the jet through the combining and delivery tubes of those steamnozzles; but in my present apparatuslestablish the jet through the combining and delivery tubes a moment before the steam is admitted to the steam-nozzles, so that when the steam is admitted to the steam-nozzles it is not required to establish the jet, but simply to maintain and increase the force of a jet already established, as will be more clear from the following description of that form of my apparatus shown in the drawings.

D is one of the steam-nozzles,d its combining-tube, and (1 its delivery-tube. The holes (1 are the regulating-holes described in my patent'above referred to.

A is the water-inlet through which water is supplied to the water-chamber a.

F is the other steam-nozzle, and f its combining and delivery tube, the steam-nozzle F being formed in the apparatus shown in the drawings by the projection of the tube (V into the enlarged mouth of the tube f.

The overflow-chamber 8 is provided with a jet apparatus 4 5 and a cock 6 7, and by means of this jet apparatus and cook a current of water can be established from water-chamber a through tubes d d f without the aid of the steam-nozzleD F, which, asIhave before said,

is one feature of my present invention. After this current has been established the steam is admitted to nozzles D F, thereby maintaining and greatly quickening that current, so that when cock 6 7 is closed the jet or current through d d f has force enough to open valve 9 and force its way into the boiler, the apparatus being piped to the boiler in the usual way, as will be plain to all skilled in the art without further description.

In the apparatus described in my former patent it was necessary to have one or more openings through the walls of tube comm unicatin g with the overfl ow chamber 8, and consequently the overflow-chamber became a vacuum-chamber after the jet was established through tube f; but in my present apparatus, when the jet apparatus 4 5 is used, the first result is to establish a partial vacuum in chamber 8, and consequently the air-pressure upon the water in thewell or tank forces the water up through inlet A into wate:r-chamber Ct, thus establishing a jet through (Z d f into chamberS and out of chamberS through tube 5 and cock 6 7, and steam is not admitted to nozzles D F until after this current or jet is established. Moreover, as soon as steam is admitted to nozzles D F and the cock 6 7 closed the chamber 8 becomes full of water under pressure, the pressure being enough greater than the boiler-pressure to open valve 9 and cause the water to enter the boiler.

The" apparatus shown in the drawings is intended for use where the water-level in the tank or well is considerably below the apparatusthat is, where the water requires to be forced by atmospheric pressure through inlet Ainto water-chambera-andits operation is as follows: The steam-inletl is piped to the boiler, so that when valve 3 is open the steam will flow through inlet 1, lifting valve 2 and flow ing through pipe 10, valve 3, nozzle 4, tube 5, and through outlet (5 of cock 7, thus forming a partial vacuum in chamber 8 and causing the atmospheric pressure on the water in the tank or well to establish a current from wator-chamber a through tubes (Z d f, as before described. Valve 11 is then opened and the steam flows through steam-inlet B and passages b and supplies nozzles D F, thereby maintaining and quickening the jet already established through (Z cl f. Cock 7 is then turned, closing outlet 6, and the jet through finstantly fills chamber 8 and causes pressure in that chamber sutficient to open valve 9 and supply the boiler. Valve 3 should of course be closed after valve 11 is opened; but n case it is not (and, as will be clear, it is immaterial, for valve 3 is used as a positive shut-oil? valve) the valve 2 acts to prevent any flow of water from chamber 8 through nozzle l, past valve 3, and through pipe 10, for the pressure in chamber 8 is greater than the boiler-pressure when the apparatus is feeding the boiler, and therefore the pressure tending to close valve 2 is greater than the steampressure tending to open it. It will of course be clear that the various valves and cooks maybe so connected as to be opened in proper order by the movement of a single handle or lever, and it will also be obvious that the jet apparatus 4 5 will be unnecessary when the chamber a is supplied with water from an elevated tank, so that the jet can be established through (Z d f by simply opening cock (3 7; but as such a head of water is not always available I have shown well-known means for establishing a jet through d (Zf.

In practice the casting which supports valve 0 (shown in section in Fig. 23) should be made in two pieces for convenience in putting tubef into place,as will be clear to all skilled in the art.

I am aware of Littles patents, No. 272,148, dated February 20,1883,and No.307,78l, dated November 11, 188-1; Felthousen and Volkers patent, No. 283,229, dated August 14-, 1883, and Colvins patent, No. 303,980, dated August 26, 188i, and disclaim all that is shown in them.

\Vhile it is not new to use two steam-jets, each havingits combining and delivery tube and each having its over[low-chamber, (see Patent No. 283,229,) yet I am the first, so far as I am aware, to use a steam-jet with acombining and delivery tube discharging directly into the combining and delivery tube of a second steam -jet which discharges into a single overflow-chamber, into which the mixed water and steam from both the steam-jets and from the combining and delivery tube of the first steam-jet are forced directly through the tube of the second jet. This new principle of construction results in decided advantages which cannot be obtained where the mixed water and steam of the first steam-jet and its combining and delivery tube is forced into an overfiow-chamber, from which overflow-chamber the water mixed with steam (passed through the combining and delivery tube of the first jet) enters the combining and delivery tube of the second jet, as in Patent No. 283,220, which, as before stated, has, in fact, two independent overflow-chainbers, one for the first steam-jet and its tube and the other for the second steam-jet and its tube.

\Yhat I claim as my invention is 1. In combination with overflow-chamber S and its waste-cock t5 7, two steam-nozzles l) and F, with their tubes (Z (Zf, nozzle 1) and its tube (7 (l emptying directly through nozzle F into its tubef, and tubef emptying directly into chamber 8, all substantially as described.

2. In a jet apparatus having an auxiliary lifting-jet, the automatic valve 2, exposed on one side to steam-pressure and on the other side to water-pressure, substantially as and for the purpose specified.

\YM. R. PARK.

l/Vitnesses:

J. E. MAYNADIER, ED\\'ARD S. BEACH. 

